DOI: 10.1002/2017JE005464
Scopus记录号: 2-s2.0-85041698994
论文题名: Experimental Constraints on the Fatigue of Icy Satellite Lithospheres by Tidal Forces
作者: Hammond N.P. ; Barr A.C. ; Cooper R.F. ; Caswell T.E. ; Hirth G.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 2 起始页码: 390
结束页码: 404
语种: 英语
英文关键词: fatigue
; fracture mechanics
; ice
; icy satellites
; tidal stress
Scopus关键词: cyclic loading
; experimental study
; fatigue
; fracture mechanics
; ice
; lithosphere
; Moon
; stress
英文摘要: Fatigue can cause materials that undergo cyclic loading to experience brittle failure at much lower stresses than under monotonic loading. We propose that the lithospheres of icy satellites could become fatigued and thus weakened by cyclical tidal stresses. To test this hypothesis, we performed a series of laboratory experiments to measure the fatigue of water ice at temperatures of 198 K and 233 K and at a loading frequency of 1 Hz. We find that ice is not susceptible to fatigue at our experimental conditions and that the brittle failure stress does not decrease with increasing number of loading cycles. Even though fatigue was not observed at our experimental conditions, colder temperatures, lower loading frequencies, and impurities in the ice shells of icy satellites may increase the likelihood of fatigue crack growth. We also explore other mechanisms that may explain the weak behavior of the lithospheres of some icy satellites. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114551
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States; Planetary Science Institute, Tucson, AZ, United States
Recommended Citation:
Hammond N.P.,Barr A.C.,Cooper R.F.,et al. Experimental Constraints on the Fatigue of Icy Satellite Lithospheres by Tidal Forces[J]. Journal of Geophysical Research: Planets,2018-01-01,123(2)